Persistent P0430 on my 2012 5.0

[M32H32IS]

2012 LR4 190k miles, 40k on reman engine.

Recently developed P0430 code. Ran 2 cans of Cataclean and still comes back after I clear it with my GAP.

What diagnostics can I do (GAP Gen 1 no BT) to figure out if I need a new cat?

 

[scapistron]

You can try new O2 sensors on the relevant bank. Should probably replace them with the new cat anyhow. Toss 3 new sensors in and if it goes away, win. If not swap them over to the new cat.

 

[powershift]

Could you try moving the sensor on the other side to the problem side and see if you still get the code? On a different topic, I'm curious about your original engine. How did it fail?

 

[M32H32IS]

Could you try moving the sensor on the other side to the problem side and see if you still get the code? On a different topic, I'm curious about your original engine. How did it fail?

Crossover busted doing 80 on the interstate (prior owner) by the time he was able to pull off the road the engine was cooked.

 

[Rover Range]

A bad sensor won't cause that DTC.
Convertor needs to be replaced.
Or, get one of these. They do work.

M18*1.5 O2 Sensor CEL Check Engine Light Spacer Eliminator Adapter Oxygen Sensor Delete Kit

Feature:1: The O2 CEL fixture actually incorporates the M18X1.5 miniature catalytic converter,which helps to get rid of the modified exhaust or the inspection engine light after removing the catalytic converter.2: Made of Zinc Plated Steel which is durable and have high strength to use.3: AVOID...

jcarpart.com

 

[COL Brown]

Replace your air filters and make sure there are no leaks in the air filter duct work. I went down a rabbit hole after getting the same codes. I replaced the spark plugs, put in cat clean and fuel injector cleaner etc. It turns out the air filters were dirty and too restrictive. I replaced them and the problem was solved.

 

[scapistron]

A bad sensor won't cause that DTC.
Convertor needs to be replaced.
Or, get one of these. They do work.

M18*1.5 O2 Sensor CEL Check Engine Light Spacer Eliminator Adapter Oxygen Sensor Delete Kit

Feature:1: The O2 CEL fixture actually incorporates the M18X1.5 miniature catalytic converter,which helps to get rid of the modified exhaust or the inspection engine light after removing the catalytic converter.2: Made of Zinc Plated Steel which is durable and have high strength to use.3: AVOID...

jcarpart.com

Would he need three of those? Or only one in the last position?

 

[Rover Range]

Only the one. The only sensor that monitors the cat efficiency is the very last one.

 

[M32H32IS]

I’m giving those a shot as I don’t believe the cat is faulty. I’ll replace it next month if need be.

I know I’ve got an exhaust leak on that side. Bank 2.

 

[itsaguything]

190000 km…. on original cats.
All filters clog…